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science guide us. And I don’t think all the information is in on whether this drug is helpful,” he said Wednesday.
Nigeria’s Health Minister Onyebuchi Chukwu has asked the US about getting the drug, but Spain has voiced caution about the serum.
US regulators meanwhile loosened restrictions on another experimental drug which may allow it to be tried on infected patients in west Africa.
Canada-based Tekmira said the US Food and Drug Administration changed the classification of its drug TKM-Ebola from full clinical hold to partial hold.
US health authorities also warned Ebola’s spread to the United States was “inevitable” due to the nature of global airline travel, but that any outbreak was not likely to be large.
The worsening outbreak prompted the United States to order the families of embassy staff in Liberia to return home, with the State Department also warning US citizens not to travel to Liberia.
First discovered in 1976 and named after a river in what is now the Democratic Republic of Congo, Ebola has killed around two-thirds of those infected, with two outbreaks registering fatality rates approaching 90 percent. The latest outbreak has a fatality rate of around 55 percent.